Taken from upstream:
    https://github.com/mCRL2org/mCRL2/commit/435421429dde9dcc5956e8a978597111a3947ec1

Fixes bug in ltscompare:
    https://listserver.tue.nl/pipermail/mcrl2-users/2022-June/000396.html

From 435421429dde9dcc5956e8a978597111a3947ec1 Mon Sep 17 00:00:00 2001
From: Maurice Laveaux <m.laveaux@tue.nl>
Date: Wed, 29 Jun 2022 10:27:58 +0200
Subject: [PATCH] Write counterexample's structured output trace on single
 line.

---
 libraries/lts/include/mcrl2/lts/detail/counter_example.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/lts/include/mcrl2/lts/detail/counter_example.h b/libraries/lts/include/mcrl2/lts/detail/counter_example.h
index c339cfde4..ca3967768 100644
--- a/libraries/lts/include/mcrl2/lts/detail/counter_example.h
+++ b/libraries/lts/include/mcrl2/lts/detail/counter_example.h
@@ -139,7 +139,7 @@ class counter_example_constructor
       if (m_structured_output)
       {
         std::cout << m_name << ": ";
-        result.save("", mcrl2::lts::trace::tfPlain);   // Write to stdout. 
+        result.save("", mcrl2::lts::trace::tfLine);   // Write to stdout.
       }
       else
       {
-- 
2.35.1

